//
//  $Id: httpd-cgi.c 241 2008-10-29 10:59:45Z jcw $
//  $Revision: 241 $
//  $Author: jcw $
//  $Date: 2008-10-29 06:59:45 -0400 (Wed, 29 Oct 2008) $
//  $HeadURL: http://tinymicros.com/svn_public/arm/lpc2148_demo/trunk/uip/apps/webserver/httpd-cgi.c $
//

/**
 * \addtogroup httpd
 * @{
 */

/**
 * \file
 *         Web server script interface
 * \author
 *         Adam Dunkels <adam@sics.se>
 *
 */

/*
 * Copyright (c) 2001-2006, Adam Dunkels.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file is part of the uIP TCP/IP stack.
 *
 * $Id: httpd-cgi.c 241 2008-10-29 10:59:45Z jcw $
 *
 */

#include "../../uip/uip.h"
#include "../../uip/psock.h"
#include "httpd.h"
#include "httpd-cgi.h"
#include "httpd-fs.h"

#include <stdio.h>
#include <string.h>

HTTPD_CGI_CALL (file, "file-stats", file_stats);
HTTPD_CGI_CALL (tcp, "tcp-connections", tcp_stats);
HTTPD_CGI_CALL (net, "net-stats", net_stats);
HTTPD_CGI_CALL (led, "led-io", led_io);

static const struct httpd_cgi_call *calls [] = { &file, &tcp, &net, &led, NULL };

/*---------------------------------------------------------------------------*/
  static
PT_THREAD (nullfunction (struct httpd_state *s, char *ptr __attribute__ ((unused))))
{
  PSOCK_BEGIN (&s->sout);
  PSOCK_END (&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_cgifunction httpd_cgi (char *name)
{
  const struct httpd_cgi_call **f;

  for (f = calls; *f != NULL; ++f)
    if (strncmp ((*f)->name, name, strlen ((*f)->name)) == 0)
      return (*f)->function;

  return nullfunction;
}
/*---------------------------------------------------------------------------*/
static unsigned short generate_file_stats (void *arg)
{
  char *f = (char *)arg;

  return snprintf ((char *) uip_appdata, UIP_APPDATA_SIZE, "%5u", httpd_fs_count (f));
}
/*---------------------------------------------------------------------------*/
static PT_THREAD (file_stats (struct httpd_state *s, char *ptr))
{
  PSOCK_BEGIN (&s->sout);

  PSOCK_GENERATOR_SEND (&s->sout, generate_file_stats, strchr (ptr, ' ') + 1);

  PSOCK_END (&s->sout);
}
/*---------------------------------------------------------------------------*/
static const char closed [] =   /*  "CLOSED",*/
  {0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0};
static const char syn_rcvd [] = /*  "SYN-RCVD",*/
  {0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56, 0x44,  0};
static const char syn_sent [] = /*  "SYN-SENT",*/
  {0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e, 0x54,  0};
static const char established [] = /*  "ESTABLISHED",*/
  {0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49, 0x53, 0x48, 0x45, 0x44, 0};
static const char fin_wait_1 [] = /*  "FIN-WAIT-1",*/
  {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 0x54, 0x2d, 0x31, 0};
static const char fin_wait_2 [] = /*  "FIN-WAIT-2",*/
  {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 0x54, 0x2d, 0x32, 0};
static const char closing [] = /*  "CLOSING",*/
  {0x43, 0x4c, 0x4f, 0x53, 0x49, 0x4e, 0x47, 0};
static const char time_wait [] = /*  "TIME-WAIT,"*/
  {0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41, 0x49, 0x54, 0};
static const char last_ack [] = /*  "LAST-ACK"*/
  {0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43, 0x4b, 0};

static const char *states [] = 
{
  closed,
  syn_rcvd,
  syn_sent,
  established,
  fin_wait_1,
  fin_wait_2,
  closing,
  time_wait,
  last_ack
};

static unsigned short generate_tcp_stats (void *arg)
{
  struct uip_conn *conn;
  struct httpd_state *s = (struct httpd_state *) arg;

  conn = &uip_conns [s->count];

  return snprintf ((char *) uip_appdata, UIP_APPDATA_SIZE,
      "<tr><td>%d</td><td>%u.%u.%u.%u:%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n",
      htons (conn->lport),
      htons (conn->ripaddr [0]) >> 8,
      htons (conn->ripaddr [0]) & 0xff,
      htons (conn->ripaddr [1]) >> 8,
      htons (conn->ripaddr [1]) & 0xff,
      htons (conn->rport),
      states [conn->tcpstateflags & UIP_TS_MASK],
      conn->nrtx,
      conn->timer,
      (uip_outstanding (conn)) ? '*' : ' ',
      (uip_stopped (conn)) ? '!' : ' ');
}
/*---------------------------------------------------------------------------*/
static PT_THREAD (tcp_stats (struct httpd_state *s, char *ptr __attribute__ ((unused))))
{
  PSOCK_BEGIN (&s->sout);

  for (s->count = 0; s->count < UIP_CONNS; ++s->count)
    if ((uip_conns [s->count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED)
      PSOCK_GENERATOR_SEND (&s->sout, generate_tcp_stats, s);

  PSOCK_END (&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short generate_net_stats (void *arg)
{
  struct httpd_state *s = (struct httpd_state *) arg;

  return snprintf ((char *) uip_appdata, UIP_APPDATA_SIZE, "%5u\r\n", ((uip_stats_t *) &uip_stat) [s->count]);
}
/*---------------------------------------------------------------------------*/
static PT_THREAD (net_stats (struct httpd_state *s, char *ptr __attribute__ ((unused))))
{
  PSOCK_BEGIN (&s->sout);

#if UIP_STATISTICS

  for (s->count = 0; s->count < sizeof (uip_stat) / sizeof (uip_stats_t); ++s->count)
    PSOCK_GENERATOR_SEND (&s->sout, generate_net_stats, s);

#endif /* UIP_STATISTICS */

  PSOCK_END (&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short generate_io_state (void *arg __attribute__ ((unused)))
{
  return snprintf ((char *) uip_appdata, UIP_APPDATA_SIZE,
      "<input type=\"checkbox\" name=\"LED2\" value=\"1\" %s>LED2", 
      (GPIO0_FIOPIN & GPIO_IO_P11) ? "" : "checked");
}
/*---------------------------------------------------------------------------*/
static PT_THREAD (led_io (struct httpd_state *s, char *ptr __attribute__ ((unused))))
{
  PSOCK_BEGIN (&s->sout);
  PSOCK_GENERATOR_SEND (&s->sout, generate_io_state, NULL);
  PSOCK_END (&s->sout);
}
/*---------------------------------------------------------------------------*/
/** @} */
